一、引言过盈配合是公差与配合中的三大类配合之一,主要用于过盈联结件的设计。过盈联结是依靠联结件之间存在的过盈,在结合面上产生结合压力,从而传递一定的轴向力、扭矩或两者的复合负荷的一种固定联结。这种联结形式结构简单,配合的定心性好,同时无需任何附加紧固件(如螺钉、键、销子等)即可提高联结件的横截面强度,因此承载能力高,承受变载和冲击的性能好。过盈配合在产品设计中所取得的经济效益,已越来越为人们所重视。许多国家对过盈配合的计算和选用做了大量的试验和研究工作。为了推广其应用,有些国家还制订了 I. INTRODUCTION Tight fit is one of the three major types of tolerance and fit, mainly used for the design of the interference fit. The interference connection is a kind of fixed connection which relies on the interference existing between the coupling pieces to generate the combined pressure on the joint surface so as to transmit a certain axial force, torque or the combined load of the two. The form of this coupling is simple, with good centering and at the same time increases the cross-sectional strength of the coupling without any additional fasteners (eg screws, keys, pins, etc.), so that it has a high load carrying capacity and withstands loads and shocks Good performance. Interference with the economic benefits of product design has been more and more attention. Many countries have done a great deal of experimentation and research on the calculation and selection of interference coordination. In order to promote its application, some countries have also formulated